Lead alloy.



I 110' Drawing.

To aZZ whom; it may concern UNITED STAWENT OFFICE.

CHARLES r. McCONNELL, on NEW YORK, N. Y.,.ASSIG1\TOR T0 .wEs'rERN ELECTRIC COMPANY, on NEW YORK, N. Y., A CORPORATION OF ILLINoIs.

LEAD ALLOY.

Specification of Letters Patent.

Be it known that I, CHARLES PcMGOON- NELL, a citizen of the United-States, residing at 314 West Ninety-ninth street, New York city, inthe'county of New York, State of New York, have invented a certain new and useful Lead Alloy, of which the follow-. ing is a full, clear, and exact description.

The subject of my invention is a lead al- J loy particularly suitable as the material for so-called tape used for winding electrical conductors such as telephone swjtchboard cables, although said alloymay be used for other purposes.

Prior to my invention, tape of the kind above mentioned-was usually made entirely of lead rolled to a'th'ickness of substantially '.0O6 of an inch and having a width of substantially .75 of an inch. When made of the alloy hereinafter described, said tape need be only about one-half as thick to obtain the same or greater strength as the tape just mentioned, and its width may be increased by one-thii'd. That is, when my alloy is used, a satisfactory tape need have. a thickness of onl approximately .003 of an inch, and its wi th can be 1 inch. It is evident thereforethat, compared with the old lead tape, a material saving in lead is effe'cted by the use of my alloy; and .it is a fact that this saving is largely in excess of the cost of the metals which are added to form the alloy. g

The alloy which forms the subject of my invention is composed of lead, antimonyand I tin. After careful investigation I have found that when my alloy is used for the manufacture of. tape for winding telephone cables, its preferred composition and the maximum and minimum permissible amounts of the metals forming the alloy are as given in the following table.

Having thus described my invention, what Patented Oct. 14., 1913. Application fil ed August 27, 1912. Serial No. 717,274.

Preferred. Maximum. Minimum.

Lead.....-..... 95.00% 96.75% 92.25% 'Antimony 4. o 6.00% 3. a Tin .50% .75% A .25

I claim and desire to secure by Letters Pat-' ent is:

1. A11 alloy composed of 93.25 to 96.75 I

.per cent. lead, 3 to 6 per cent. antimony, and .25to .75 of one per cent. tin.

2. An alloy composed of, approximately, 95 per cent. lead, 4.5 .5 of one per cent. tin.

3. As an article of manufacture a thin me tallic tape for winding electrical conductors oomposed of an alloy of approximately 95 per cent. lead, 4.5 per cent. antimony and .5 of one er cent. of, tin.

In w1tness.whereof, I hereunto subscr be my name this 26th day of August A. D., 1912. I I

CHARLES P. cooN ELL.

Witnesses: y

ELLA EDLER -WALTER F. HOFFMAN."

per cent. antimony, and 

